JPH0676488A - テスト・プロシージヤを遂行する回路 - Google Patents

テスト・プロシージヤを遂行する回路

Info

Publication number
JPH0676488A
JPH0676488A JP5135690A JP13569093A JPH0676488A JP H0676488 A JPH0676488 A JP H0676488A JP 5135690 A JP5135690 A JP 5135690A JP 13569093 A JP13569093 A JP 13569093A JP H0676488 A JPH0676488 A JP H0676488A
Authority
JP
Japan
Prior art keywords
error value
data
sample
circuit
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5135690A
Other languages
English (en)
Japanese (ja)
Inventor
Jonathan D Coker
ジョナサン・ダーレル・クッカー
Richard L Galbraith
リチャード・レオ・ガルブレイス
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of JPH0676488A publication Critical patent/JPH0676488A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1816—Testing
    • G11B20/182—Testing using test patterns
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09—Digital recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Digital Magnetic Recording (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
JP5135690A 1992-07-30 1993-06-07 テスト・プロシージヤを遂行する回路 Pending JPH0676488A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/922,591 US5392295A (en) 1992-07-30 1992-07-30 Error measurement circuit
US922591 1992-07-30

Publications (1)

Publication Number Publication Date
JPH0676488A true JPH0676488A (ja) 1994-03-18

Family

ID=25447278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5135690A Pending JPH0676488A (ja) 1992-07-30 1993-06-07 テスト・プロシージヤを遂行する回路

Country Status (5)

Country Link
US (1) US5392295A (de)
EP (1) EP0581717B1 (de)
JP (1) JPH0676488A (de)
DE (1) DE69327618T2 (de)
SG (1) SG42844A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011054220A (ja) * 2009-08-31 2011-03-17 Hitachi High-Technologies Corp ディスクの突起検出・平坦度測定回路およびディスクのグライドテスター

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5424881A (en) * 1993-02-01 1995-06-13 Cirrus Logic, Inc. Synchronous read channel
US5754353A (en) * 1993-07-01 1998-05-19 Cirrus Logic, Inc. Channel quality circuit in a sampled amplitude read channel
US5761212A (en) * 1993-07-01 1998-06-02 Cirrus Logic, Inc. Channel quality
JP3467832B2 (ja) * 1994-04-20 2003-11-17 ソニー株式会社 記録方法及び記録装置
US6313961B1 (en) 1994-04-29 2001-11-06 Cirrus Logic, Inc. Method and apparatus for calibrating a synchronous read channel integrated circuit
US5493454A (en) * 1994-10-04 1996-02-20 Quantum Corporation Write precompensation optimization in a PRML channel using a selected PRML signal level
US5987634A (en) * 1994-11-17 1999-11-16 Cirrus Logic, Inc. Channel quality circuit in a sampled amplitude read channel
US5563746A (en) * 1994-11-17 1996-10-08 Cirrus Logic, Inc. Real time media defect scanning in a sampled amplitude read channel
US6124992A (en) * 1995-02-08 2000-09-26 Seagate Technology Llc System and method for reconstructing a signal wave in a partial response read channel
EP0759615A3 (de) * 1995-08-21 1997-11-26 Nikon Corporation Plattenförmiges Aufzeichnungsmedium und Wiedergabeeinrichtung
US5889784A (en) * 1996-02-05 1999-03-30 Hewlett-Packard Company Predictive failure detection for data storage systems
US5784296A (en) * 1996-04-30 1998-07-21 Quantum Corporation Method and apparatus for spectral analysis in a disk recording system
US5737342A (en) * 1996-05-31 1998-04-07 Quantum Corporation Method for in-chip testing of digital circuits of a synchronously sampled data detection channel
US5786951A (en) * 1996-06-05 1998-07-28 Cirrus Logic, Inc. Sampled amplitude read channel employing a discrete time noise generator for calibration
DE19882604T1 (de) 1997-08-11 2000-08-10 Seagate Technology Statischer Viterbi-Detektor für Kanäle, die einen Code mit zeitveränderlichen Constraints verwenden
US6201840B1 (en) 1997-10-08 2001-03-13 Seagate Technology, Inc. Method and apparatus for detecting data in magnetic recording using decision feedback
US6493162B1 (en) 1997-12-05 2002-12-10 Seagate Technology Llc Frame synchronization for viterbi detector
US6181499B1 (en) * 1998-04-07 2001-01-30 International Business Machines Corporation Method and apparatus for testing the digital read channel circuit of a data storage device
US6137644A (en) * 1998-05-19 2000-10-24 International Business Machines Corporation Method for adaptive formatting and track traversal in data storage devices
US6158027A (en) * 1998-08-31 2000-12-05 International Business Machines Corporation Enhanced noise-predictive maximum likelihood (NPML) data detection method and apparatus for direct access storage device (DASD)
US6195219B1 (en) 1998-10-20 2001-02-27 International Business Machines Corporation Method and apparatus for improving a thermal response of a magnetoresistive element
US6636372B1 (en) 1999-04-20 2003-10-21 Infineon Technologies North America Corp. Accumulating read channel performance data
US6574754B1 (en) 2000-02-14 2003-06-03 International Business Machines Corporation Self-monitoring storage device using neural networks
US6545830B1 (en) 2001-04-30 2003-04-08 Western Digital Technologies, Inc. Disk drive storing test pattern in calibration sectors that are longer than user data sectors for zone parameter calibration
US6690523B1 (en) 2001-04-30 2004-02-10 Western Digital Technologies, Inc. Disk drive for updating operating zone parameters with adapted zone parameters calibrated in the field
US6611393B1 (en) 2001-04-30 2003-08-26 Western Digital Technologies, Inc. Disk drive employing field calibration based on marginal sectors
US7511910B1 (en) 2004-10-27 2009-03-31 Marvell International Ltd. Asymmetry correction in read signal
US7298570B1 (en) 2004-10-27 2007-11-20 Marvell International Ltd. Asymmetry correction in read signal
US8179952B2 (en) * 2008-05-23 2012-05-15 Integrated Device Technology Inc. Programmable duty cycle distortion generation circuit
US20090292962A1 (en) * 2008-05-23 2009-11-26 Arm Limited Integrated circuit with inter-symbol interference self-testing
US8194721B2 (en) * 2008-05-23 2012-06-05 Integrated Device Technology, Inc Signal amplitude distortion within an integrated circuit
US8259888B2 (en) * 2008-05-23 2012-09-04 Integrated Device Technology, Inc. Method of processing signal data with corrected clock phase offset

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62212546A (ja) * 1986-03-14 1987-09-18 Sony Corp デイスク計測装置

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS534407B1 (de) * 1970-12-25 1978-02-17
US3755731A (en) * 1972-01-10 1973-08-28 Us Navy System for detecting dropout and noise characteristics of magnetic tape with switch means to select which characteristics to be detected
DE2747333C3 (de) * 1977-10-21 1980-08-07 Basf Ag, 6700 Ludwigshafen Meßverfahren und Meßeinrichtung zur Erfassung der elektroakustischen Eigenschaften von Magnetbändern
US4399474A (en) * 1981-08-10 1983-08-16 Ampex Corporation Automatic threshold tracking system
US4519077A (en) * 1982-08-30 1985-05-21 Amin Pravin T Digital processing system with self-test capability
US4635142A (en) * 1983-11-22 1987-01-06 Storage Technology Corporation Amplitude sensor with adaptive threshold generation
US4612586A (en) * 1984-06-05 1986-09-16 Memorex Corporation Method for measuring timing asymmetry in a magnetic storage system
US4821125A (en) * 1986-06-11 1989-04-11 International Business Machines Corporation Compensation of write current adn delta-V for recording component and radial position
EP0363551B1 (de) * 1988-10-17 1994-12-07 International Business Machines Corporation Adaptiver Entzerrer für Aufzeichnungssysteme unter Verwendung von Partial-Response-Signalisierung
US4933939A (en) * 1988-11-23 1990-06-12 National Semiconductor Corporation Method and apparatus for error measurement and reduction in a mass storage device memory system
US5121263A (en) * 1989-10-31 1992-06-09 International Business Machines Corporation Method and apparatus for determining the error rate of magnetic recording disk drives having a amplitude sampling data detection
US5200981A (en) * 1990-08-07 1993-04-06 National Semiconductor Corporation Fine timing recovery for QAM modem receiver
US5208832A (en) * 1990-08-08 1993-05-04 National Semiconductor Corporation Methods and apparatus for detecting repetitive sequences
US5220466A (en) * 1991-05-21 1993-06-15 International Business Machines Corporation Method and apparatus for digital filter control in a partial-response maximum-likelihood disk drive system
US5233482A (en) * 1991-07-31 1993-08-03 International Business Machines Corporation Thermal asperity compensation for PRML data detection
US5258940A (en) * 1992-03-16 1993-11-02 International Business Machines Corporation Distributed arithmetic digital filter in a partial-response maximum-likelihood disk drive system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62212546A (ja) * 1986-03-14 1987-09-18 Sony Corp デイスク計測装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011054220A (ja) * 2009-08-31 2011-03-17 Hitachi High-Technologies Corp ディスクの突起検出・平坦度測定回路およびディスクのグライドテスター

Also Published As

Publication number Publication date
DE69327618D1 (de) 2000-02-24
DE69327618T2 (de) 2000-07-06
EP0581717A2 (de) 1994-02-02
EP0581717B1 (de) 2000-01-19
SG42844A1 (en) 1997-10-17
US5392295A (en) 1995-02-21
EP0581717A3 (en) 1995-12-20

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